vuejs中的单元测试
Unit testing in vuejs
我正在尝试 configure/run 我的第一个 Vuejs 单元测试。但我无法解决配置问题。我已经尝试安装这些库，但由于某种原因，我不断收到错误消息。
下面是我的代码示例：
我的目录结构：
hello/
dist/
node_modules/
src/
components/
hello.vue
test/
setup.js
test.spec.js
.babelrc
package.json
webpack.config.js
我文件中的内容
src/components/hello.vue
<template> <div> {{message}} </div> </template>
<script>
export default {
name: 'hello',
data () { return message: 'Hi' },
created () {
// ...
}
}
test/setup.js
// setup JSDOM
require('jsdom-global')()
// make expect available globally
global.expect = require('expect')
test/test.spect.js
import { shallow } from 'vue/test-utils'
import { hello} from '../../../src/components/hello.vue'
describe('hello', () => {
// just testing simple data to see if it works
expect(1).toBe(1)
})
.babelrc
{
"env": {
"development": {
"presets": [
[
"env",
{
"modules": false
}
]
]
},
"test": {
"presets": [
[
"env",
{
"modules": false,
"targets": {
"node": "current"
}
}
]
],
"plugins": [
"istanbul"
]
}
}
}
package.json
...
"scripts": {
"build": "webpack -p",
"test": "cross-env NODE_ENV=test nyc mocha-webpack --webpack-config webpack.config.js --require test/setup.js test/**/*.spec.js"
},
"devDependencies": {
"babel-core": "^6.26.0",
"babel-loader": "^7.1.2",
"babel-preset-env": "^1.6.1",
"cross-env": "^5.1.1",
"css-loader": "^0.28.7",
"file-loader": "^1.1.5",
"node-sass": "^4.7.2",
"sass-loader": "^6.0.6",
"vue-loader": "^13.5.0",
"vue-template-compiler": "^2.5.9",
"webpack": "^3.10.0",
"webpack-dev-server": "^2.9.7",
"jsdom": "^11.3.0",
"jsdom-global": "^3.0.2",
"mocha": "^3.5.3",
"mocha-webpack": "^1.0.0-rc.1",
"nyc": "^11.4.1",
"expect": "^21.2.1",
"@vue/test-utils": "^1.0.0-beta.12"
},
...
"nyc": {
"include": [
"src/**/*.(js|vue)"
],
"instrument": false,
"sourceMap": false
}
最后是我的 webpack.config.js
...
if(process.env.NODE_ENV == "test") {
module.exports.externals = [ require ('webpack-node-externals')()]
module.exports.devtool = 'inline-cheap-module-source-map'
}
现在，当我从我的根文件夹 hello/ 运行 npm test 时，我收到此错误：
> hello@1.0.0 test C:\Users\john\vue-learn\hello
> npm run e2e
> hello@1.0.0 e2e C:\Users\john\vue-learn\hello
> node test/e2e/runner.js
Starting selenium server... started - PID: 12212
[Test] Test Suite
=====================
Running: default e2e tests
× Timed out while waiting for element <#app> to be present for 5000 milliseconds. - expected "visible" but got: "not found"
at Object.defaultE2eTests [as default e2e tests] (C:/Users/john/Google Drive/lab/hello/test/e2e/specs/test.js:13:8)
at _combinedTickCallback (internal/process/next_tick.js:131:7)
FAILED: 1 assertions failed (20.281s)
_________________________________________________
TEST FAILURE: 1 assertions failed, 0 passed. (20.456s)
× test
- default e2e tests (20.281s)
Timed out while waiting for element <#app> to be present for 5000 milliseconds. - expected "visible" but got: "not found"
at Object.defaultE2eTests [as default e2e tests] (C:/Users/john/Google Drive/lab/hello/test/e2e/specs/test.js:13:8)
at _combinedTickCallback (internal/process/next_tick.js:131:7)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! hello@1.0.0 e2e: `node test/e2e/runner.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the hello@1.0.0 e2e script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\john\AppData\Roaming\npm-cache\_logs18-04-03T23_53_15_976Z-debug.log
npm ERR! Test failed. See above for more details.
我不知道为什么会这样。当我最初安装我的 webpack 项目时，我没有使用 npm init 命令安装测试库，所以没有冲突，但我仍然得到这个错误：
更新（赏金后）
我只是想测试我的 vuejs 应用程序。希望 jasmine/karma。如果有人知道如何将这些集成到一个简单的应用程序和 运行 第一次测试中，我可以从那里开始。我的问题不是编写测试而是配置它
根据您在此处提供的错误日志，您发现的失败测试是端到端测试。实际上，通过执行命令 npm test e2e，您正在使用 Nightwatch 进行测试。请参阅 /tests/e2e/specs。在这里你应该有一个默认的测试文件来检查你的 Vue 应用程序是否正确创建了一个标识为 app.
的 DOM 元素
测试应该如下：
// For authoring Nightwatch tests, see
// http://nightwatchjs.org/guide#usage
module.exports = {
'default e2e tests': function (browser) {
// automatically uses dev Server port from /config.index.js
// default: http://localhost:8080
// see nightwatch.conf.js
const devServer = browser.globals.devServerURL
browser
.url(devServer)
.waitForElementVisible('#app', 5000)
.assert.elementPresent('.hello')
.assert.containsText('h1', 'Welcome to Your Vue.js App')
.assert.elementCount('img', 1)
.end()
}
}
在您的情况下，此测试失败是因为您可能删除了通过 vue-cli 脚手架生成的名为 App.vue 的文件。你得到的错误是因为上面的测试检查，超时 5 秒，如果一个名为 "app" 的 DOM 节点被渲染（即：.waitForElementVisible('#app', 5000)）。
基本上它失败了，因为您实际上不再在您的应用程序中提供此 div（可能是由于 App.vue 删除）。
所以你有两个选择：
恢复 App.vue 文件（即：创建一个 div 标识为 'app' 并在其中挂载 Vue 实例）；
根据您的需要从头到尾编辑。
希望对您有所帮助！
首先，您不需要在项目中启用端到端测试。我会说重新开始
$ npm install -g vue-cli
$ vue init webpack vue-testing
? Project name vue-testing
? Project description A Vue.js project
? Author Tarun Lalwani <tarun.lalwani@payu.in>
? Vue build standalone
? Install vue-router? Yes
? Use ESLint to lint your code? Yes
? Pick an ESLint preset Standard
? Set up unit tests Yes
? Pick a test runner karma
? Setup e2e tests with Nightwatch? No
? Should we run `npm install` for you after the project has been created? (recommended) yarn
对Setup e2e tests with Nightwatch说N，对Pick a test runner说Karma。
$ npm test
> vue-testing@1.0.0 test /Users/tarun.lalwani/Desktop/tarunlalwani.com/tarunlalwani/workshop/ub16/so/vue-testing
> npm run unit
> vue-testing@1.0.0 unit /Users/tarun.lalwani/Desktop/tarunlalwani.com/tarunlalwani/workshop/ub16/so/vue-testing
> cross-env BABEL_ENV=test karma start test/unit/karma.conf.js --single-run
07 04 2018 21:35:28.620:INFO [karma]: Karma v1.7.1 server started at http://0.0.0.0:9876/
07 04 2018 21:35:28.629:INFO [launcher]: Launching browser PhantomJS with unlimited concurrency
07 04 2018 21:35:28.645:INFO [launcher]: Starting browser PhantomJS
07 04 2018 21:35:32.891:INFO [PhantomJS 2.1.1 (Mac OS X 0.0.0)]: Connected on socket M1HeZIiOis3eE3mLAAAA with id 44927405
HelloWorld.vue
✓ should render correct contents
PhantomJS 2.1.1 (Mac OS X 0.0.0): Executed 1 of 1 SUCCESS (0.061 secs / 0.041 secs)
TOTAL: 1 SUCCESS
=============================== Coverage summary ===============================
Statements : 100% ( 2/2 )
Branches : 100% ( 0/0 )
Functions : 100% ( 0/0 )
Lines : 100% ( 2/2 )
================================================================================
现在你的 npm test 可以正常工作了。
我正在尝试 configure/run 我的第一个 Vuejs 单元测试。但我无法解决配置问题。我已经尝试安装这些库，但由于某种原因，我不断收到错误消息。
下面是我的代码示例：
我的目录结构：
hello/
dist/
node_modules/
src/
components/
hello.vue
test/
setup.js
test.spec.js
.babelrc
package.json
webpack.config.js
我文件中的内容
src/components/hello.vue
<template> <div> {{message}} </div> </template>
<script>
export default {
name: 'hello',
data () { return message: 'Hi' },
created () {
// ...
}
}
test/setup.js
// setup JSDOM
require('jsdom-global')()
// make expect available globally
global.expect = require('expect')
test/test.spect.js
import { shallow } from 'vue/test-utils'
import { hello} from '../../../src/components/hello.vue'
describe('hello', () => {
// just testing simple data to see if it works
expect(1).toBe(1)
})
.babelrc
{
"env": {
"development": {
"presets": [
[
"env",
{
"modules": false
}
]
]
},
"test": {
"presets": [
[
"env",
{
"modules": false,
"targets": {
"node": "current"
}
}
]
],
"plugins": [
"istanbul"
]
}
}
}
package.json
...
"scripts": {
"build": "webpack -p",
"test": "cross-env NODE_ENV=test nyc mocha-webpack --webpack-config webpack.config.js --require test/setup.js test/**/*.spec.js"
},
"devDependencies": {
"babel-core": "^6.26.0",
"babel-loader": "^7.1.2",
"babel-preset-env": "^1.6.1",
"cross-env": "^5.1.1",
"css-loader": "^0.28.7",
"file-loader": "^1.1.5",
"node-sass": "^4.7.2",
"sass-loader": "^6.0.6",
"vue-loader": "^13.5.0",
"vue-template-compiler": "^2.5.9",
"webpack": "^3.10.0",
"webpack-dev-server": "^2.9.7",
"jsdom": "^11.3.0",
"jsdom-global": "^3.0.2",
"mocha": "^3.5.3",
"mocha-webpack": "^1.0.0-rc.1",
"nyc": "^11.4.1",
"expect": "^21.2.1",
"@vue/test-utils": "^1.0.0-beta.12"
},
...
"nyc": {
"include": [
"src/**/*.(js|vue)"
],
"instrument": false,
"sourceMap": false
}
最后是我的 webpack.config.js ...
if(process.env.NODE_ENV == "test") {
module.exports.externals = [ require ('webpack-node-externals')()]
module.exports.devtool = 'inline-cheap-module-source-map'
}
现在，当我从我的根文件夹 hello/ 运行 npm test 时，我收到此错误：
> hello@1.0.0 test C:\Users\john\vue-learn\hello
> npm run e2e
> hello@1.0.0 e2e C:\Users\john\vue-learn\hello
> node test/e2e/runner.js
Starting selenium server... started - PID: 12212
[Test] Test Suite
=====================
Running: default e2e tests
× Timed out while waiting for element <#app> to be present for 5000 milliseconds. - expected "visible" but got: "not found"
at Object.defaultE2eTests [as default e2e tests] (C:/Users/john/Google Drive/lab/hello/test/e2e/specs/test.js:13:8)
at _combinedTickCallback (internal/process/next_tick.js:131:7)
FAILED: 1 assertions failed (20.281s)
_________________________________________________
TEST FAILURE: 1 assertions failed, 0 passed. (20.456s)
× test
- default e2e tests (20.281s)
Timed out while waiting for element <#app> to be present for 5000 milliseconds. - expected "visible" but got: "not found"
at Object.defaultE2eTests [as default e2e tests] (C:/Users/john/Google Drive/lab/hello/test/e2e/specs/test.js:13:8)
at _combinedTickCallback (internal/process/next_tick.js:131:7)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! hello@1.0.0 e2e: `node test/e2e/runner.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the hello@1.0.0 e2e script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\john\AppData\Roaming\npm-cache\_logs18-04-03T23_53_15_976Z-debug.log
npm ERR! Test failed. See above for more details.
我不知道为什么会这样。当我最初安装我的 webpack 项目时，我没有使用 npm init 命令安装测试库，所以没有冲突，但我仍然得到这个错误：
更新（赏金后）
我只是想测试我的 vuejs 应用程序。希望 jasmine/karma。如果有人知道如何将这些集成到一个简单的应用程序和 运行 第一次测试中，我可以从那里开始。我的问题不是编写测试而是配置它
根据您在此处提供的错误日志，您发现的失败测试是端到端测试。实际上，通过执行命令 npm test e2e，您正在使用 Nightwatch 进行测试。请参阅 /tests/e2e/specs。在这里你应该有一个默认的测试文件来检查你的 Vue 应用程序是否正确创建了一个标识为 app.
测试应该如下：
// For authoring Nightwatch tests, see
// http://nightwatchjs.org/guide#usage
module.exports = {
'default e2e tests': function (browser) {
// automatically uses dev Server port from /config.index.js
// default: http://localhost:8080
// see nightwatch.conf.js
const devServer = browser.globals.devServerURL
browser
.url(devServer)
.waitForElementVisible('#app', 5000)
.assert.elementPresent('.hello')
.assert.containsText('h1', 'Welcome to Your Vue.js App')
.assert.elementCount('img', 1)
.end()
}
}
在您的情况下，此测试失败是因为您可能删除了通过 vue-cli 脚手架生成的名为 App.vue 的文件。你得到的错误是因为上面的测试检查，超时 5 秒，如果一个名为 "app" 的 DOM 节点被渲染（即：.waitForElementVisible('#app', 5000)）。
基本上它失败了，因为您实际上不再在您的应用程序中提供此 div（可能是由于 App.vue 删除）。
所以你有两个选择：
恢复 App.vue 文件（即：创建一个 div 标识为 'app' 并在其中挂载 Vue 实例）；
根据您的需要从头到尾编辑。
希望对您有所帮助！
首先，您不需要在项目中启用端到端测试。我会说重新开始
$ npm install -g vue-cli
$ vue init webpack vue-testing
? Project name vue-testing
? Project description A Vue.js project
? Author Tarun Lalwani <tarun.lalwani@payu.in>
? Vue build standalone
? Install vue-router? Yes
? Use ESLint to lint your code? Yes
? Pick an ESLint preset Standard
? Set up unit tests Yes
? Pick a test runner karma
? Setup e2e tests with Nightwatch? No
? Should we run `npm install` for you after the project has been created? (recommended) yarn
对Setup e2e tests with Nightwatch说N，对Pick a test runner说Karma。
$ npm test
> vue-testing@1.0.0 test /Users/tarun.lalwani/Desktop/tarunlalwani.com/tarunlalwani/workshop/ub16/so/vue-testing
> npm run unit
> vue-testing@1.0.0 unit /Users/tarun.lalwani/Desktop/tarunlalwani.com/tarunlalwani/workshop/ub16/so/vue-testing
> cross-env BABEL_ENV=test karma start test/unit/karma.conf.js --single-run
07 04 2018 21:35:28.620:INFO [karma]: Karma v1.7.1 server started at http://0.0.0.0:9876/
07 04 2018 21:35:28.629:INFO [launcher]: Launching browser PhantomJS with unlimited concurrency
07 04 2018 21:35:28.645:INFO [launcher]: Starting browser PhantomJS
07 04 2018 21:35:32.891:INFO [PhantomJS 2.1.1 (Mac OS X 0.0.0)]: Connected on socket M1HeZIiOis3eE3mLAAAA with id 44927405
HelloWorld.vue
✓ should render correct contents
PhantomJS 2.1.1 (Mac OS X 0.0.0): Executed 1 of 1 SUCCESS (0.061 secs / 0.041 secs)
TOTAL: 1 SUCCESS
=============================== Coverage summary ===============================
Statements : 100% ( 2/2 )
Branches : 100% ( 0/0 )
Functions : 100% ( 0/0 )
Lines : 100% ( 2/2 )
================================================================================
现在你的 npm test 可以正常工作了。